6 May
2012
6 May
'12
12:46 p.m.
And USB
as a cheap source of power makes all of those really cool
devices--shavers, foot warmers, fans, etc. possible.
[So] does a bench supply...
it's pretty nifty to be able to get 2.5W and 5W 5V
power supplies that
inexpensively. Of course, they're also not of the same quality as a
bench supply. I wouldn't use them for anything that I can't easily repair.
I asume the mains powered ones are small SMPSUs. I do wondwe what happens
when (not if0 the chopper transsitor fails dothey havve sufficent
internal protective devices not to be a hazard (note : complyign weith
the regualtions is most certianly not the same thing!)
-tony